Java: is CountDownLatch threadsafe

Question

In the docs for, CountDownLatchI see something like:

public void run () {
      try {
        startSignal.await ();
        doWork ();
        doneSignal.countDown ();
      } catch (InterruptedException ex) {} // return;
}

Where startSignaland doneSignalare the objects CountDownLatch.

The docs say nothing about whether the class is thread safe or not.

Answer 1

Since it is intended to be used by multiple threads, it would be fair to assume that it does not contain threads to most thread safety values.

There is even a random action (from your link ):

: , countDown() () .

, countDown? ? , countDown .